Size-Dependent Transport and Cytotoxicity of Mitomycin-Gold Nanoparticle Conjugates in 2D and 3D Mammalian Cell Models
作者:Isabel García、Malou Henriksen-Lacey、Javier Calvo、Dorleta Jimenez de Aberasturi、Manuel M. Paz、Luis M. Liz-Marzán
DOI:10.1021/acs.bioconjchem.8b00898
日期:2019.1.16
This work aims at learning how the size of gold nanocarriers influences the transport of DNA-alkylating antitumoral drugs. For this purpose, we devised conjugates of mercaptoethylmitomycin C (MEMC), a DNA alkylating agent, with gold nanoparticles of different sizes (2, 5, and 14 nm), and studied how size affects drug cytotoxicity, tumor penetrability, cellular uptake, and intracellular localization using two-dimensional (2D) and three-dimensional (3D) cell models. We show that only small, 2 nm, nanoparticles can transport MEMC efficiently to the cell nucleus, whereas MEMC cell uptake is much lower when delivered by these small nanoparticles than with the larger ones. 3D cellular models showed that smaller nanoparticles can transport MEMC toward deeper areas of tumor spheroids as compared to larger nanoparticles. We discuss the insights of this work toward the efficient delivery of DNA-targeting drugs.
这项工作旨在研究金纳米载体的尺寸如何影响DNA烷基化抗癌药物的传输。为此,我们将巯基乙基丝裂霉素C(一种DNA烷基化剂)与不同尺寸(2、5和14纳米)的金纳米颗粒结合,并利用二维(2D)和三维(3D)细胞模型研究尺寸如何影响药物的细胞毒性、肿瘤渗透性、细胞摄取和细胞内定位。我们发现,只有2纳米的纳米颗粒能够有效地将MEMC运输到细胞核,而通过这些小纳米颗粒递送的MEMC细胞摄取量远低于通过较大纳米颗粒递送的。3D细胞模型显示,与较大的纳米颗粒相比,较小的纳米颗粒能将MEMC运送到肿瘤球体的更深层区域。我们将讨论这项工作对有效递送DNA靶向药物的启示。